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Air and Aerodynamics

Air and Aerodynamics. Like fish, you live in one kind of “environment” too. You are adapted to this environment from the moment you are born. You move throughout it without effort. What is it?

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Air and Aerodynamics

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  1. Air and Aerodynamics

  2. Like fish, you live in one kind of “environment” too. You are adapted to this environment from the moment you are born. You move throughout it without effort. What is it? It is air. You live in a vast ocean of air. You can not see , but when the trees sway or the telephone lines sing, you know it is there, blowing and swirling around you. Did you know that in one minute, you breathe In about seven liters of air. We are going to be studying how air works and how air moves.

  3. What Is Air? Air is all around you, but you cannot see it. So would you say that it is something or is it nothing at all? Does air have weight? Does it take up space? What do you think? The following experiments might seem like hocus pocus, but each one demonstrates a remarkable property of air. Try to predict what will happen. You might be surprised!

  4. Upside Down Glass Materials: • A glass half • Glass filled with water. • A piece of cardboard. • Sink • Glass stuffed with a sheet of paper. • A funnel • A tennis ball

  5. Upside down glass What to Do: • Put the cardboard over the top of the glass. • Hold the cardboard tightly against the glass. • Over a sink, turn the glass upside down while still holding the cardboard in place. Keep the glass straight. • What do you predict will happen if you take your hand away from the cardboard? • Take your hand away from the cardboard. What happens?

  6. Dry or wet • Make sure the paper towel is stuffed tightly into the bottom of the glass so that it stays there when you turn it upside down. • Fill the sink with water. • Turn the glass upside down. Hold it straight and push it completely down. • Hold it underwater for about 15 seconds. Then pull the glass straight out of the water without tilting it. What do you predict? Will the towel be wet or dry?

  7. What did you learn from these experiments? In each experiment you learned about some of the properties of air. In each activity, you learned that air takes up space. This means that nothing else can occupy the same space at the same time.

  8. Properties of Air • Air takes up space. • It has a measurable mass/weight. • Air exerts pressure. It fills up containers. • Air has temperature.

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